Design of I.C. Engine Components MCQ Test - Set 01 - ObjectiveBooks
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Design of I.C. Engine Components MCQ Test - Set 01

Practice Test: Question Set - 01


1. For maximum torque condition, the crank angle is,
    (A) 0° from top dead centre for petrol and diesel engines
    (B) 33° before top dead centre for petrol engine and 1° after top dead centre position for diesel engine
    (C) 25° to 35° for petrol engine and 30° to 40° for diesel engine from top dead centre
    (D) 90° from top dead centre for petrol and diesel engines

2. The function of piston skirt is 
    (A) To provide bearing surface for side thrust
    (B) To support gas load
    (C) To support gudgeon pin
    (D) To seal the cylinder and prevent leakage of oil past piston

3. The function of valve gear mechanism is,
    (A) To rotate the cam 
    (B) To reduce the speed of crankshaft
    (C) To transmit the power
    (D) Open and close inlet and exhaust valve

4. Whipping stress is due to
    (A) Vibrations of crankshaft
    (B) Reciprocating motion of piston
    (C) Inertia force on connecting rod
    (D) Obliquity of connecting rod

5. The main objective of providing two concentric valve springs, one inside another, in heavy duty engines is,
    (A) To increase force on valve
    (B) To eliminate surge
    (C) To provide fail safe system
    (D) To provide linear force-deflection characteristic

6. I.C. engine cylinder is made of, 
    (A) Cast iron 
    (B) Plain carbon steel
    (C) Alloy steel 
    (D) Copper

7. Connecting rod is made of, 
    (A) Aluminium 
    (B) Medium carbon steel
    (C) Cast iron 
    (D) Babbitt

8. The ratio of length of stroke to cylinder bore (l/D) is usually,
    (A) 1/2
    (B) 5
    (C) 1.5
    (D) 1/4

9. Piston is made of,
    (A) Alloy steel 
    (B) Plain carbon steel
    (C) Cast iron 
    (D) Brass

10. The ratio of length of connecting rod to the crank radius (L/r) is usually,
    (A) 1.5 to 2 
    (B) 10 to 12 
    (C) 4 to 5 
    (D) 1:1 

11. When the length of connecting rod is small, it results in
    (A) Greater angular swing and greater side thrust on piston
    (B) Lesser angular swing and lesser side thrust on piston
    (C) More chances of buckling failure
    (D) No side thrust on piston

12. Cylinder thickness is calculated on the basis of,
    (A) Radial stress 
    (B) Residual stress
    (C) Whipping stress 
    (D) Circumferential hoop stress

13. At the top dead centre position, the crankshaft is subjected to,
    (A) Maximum torque 
    (B) Maximum bending moment
    (C) Maximum torsional and bending moment
    (D) None of the above

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